Discharge-vanes for centrifugal compressors.



- L. 0. LOB E STEIN. DISCHARGE VANES-FOR T IF L OOMPRESSfORS.

APPLICATION JUL 1912.

Witnesses: H 4 I nverlbori I Louis C. Loewensbein.

Waw f1 0 all whom it may concern:

UNITED s'rarns rarest orator;

LOUIS C. LOEWENslEIN, OF LYNN, MASSACHUSETTS, ASSIGNOR. T0 GENERAL ELECTRIC CQMI E ANY, A CORPORATION OF NEW YORK.

DISOHARGE-VANES FOR ,CEN'DRIFUGAL OOMPRESSOR S.

Specification of Letters Patent.

Application filed July 31, 1912. Serial No. 712,495.

Be it known that I, LOUIS C. LOEWEN- STEIN, a citizen of the United States, residing at Lynn, county. of Essex, State of Massachusetts, have invented certain new and useful Improvements in Discharge-Vance for Centrifugal Compressors, of which the following is a specification. a

Thisinvention relates to centrifugal compressors, and its objectis to provide an improved mode of securing the discharge vanes in position.

The principal point aimed at is to get rid of rivets and any form of support in the passages between the vanes so that there is no interference with the flow of air, espe- "cially at the beginning where the velocity is highest.

Other ends in view are the prevention of vibration and noise, the maintenance of the vanes in accurate positions, and the lessening of cost of construction.

To accomplish these results, i mount the vanes in grooves in the side plates of the diffuser, the side edges of the vanes being preferably-chamfered off and the grooves made slightly V-shaped to insure a tight fit. N air the outer end of each vane a transverse bolt or rivet is inserted to hold the side plates together and also to secure the vane .in position.

In the accompanying drawing, Figure 1 is a section of a portion of a centrifugal comprcswr showing my improved discharge vanes in position; Fig. 2- is a cross vsection of the diffuser on a larger scale. taken on line 2-2, Fig/l: Fig. 3 is a section along one of the vanes on asmaller scale; and Fig.

at is a. similar section showing a modified construction.

The annular side plates 1.2 of the diffuser gloves are preferably tapered or V-shapcd,

as shown at 4. in Fig. 2, though a groove with parallel walls may be used if deslred,

"shown at 5.

sides to fit the surface of the vanes.

Patented Jan. 27, rail.

The discharge vanes 6 have their side edges received in the grooves 3, said edges being either chamfered 01' not according to the shape of the grooves in which they are inserted. Near the, outer end of each vane, where it will interfere least with the flow of air, is a stout rivet 7 whose ends pass .55 through the side plates 1, 2 and are peenefrl over, as shown. The rivets serve not only to connect the side lates but also to support the vanes, being attened on their under,

Rivetsfit) 8 secure the vanes to the rivets 7.

Instead of a continuous groove, I may form a series of short grooves, recesses or depressions in the side plates to receive tongues 9 on the edges .of the vanes 10 as shown in Fig. 4. These vanes may be cured to the transverse riVets T, as in the structure shown in the other figures of the drawing.

It will be apparent that the several objects aimed at, as enumerated above, are attained by the construction which I have disclosed. I

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which Inow consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by other means.

\VhatI claim as new and desire to secure by Letters Patent of the United States, is,--

1. In a centrifugal compressor, a diffuser having its side plates grooved, discharge vanes having their side edges received in said grooves, and members extending transversely between said side plates adjacent the vanes and secured thereto.

2. In a centrifugal compressorya diffuser having its side plates provided with grooves V-shaped in cross section, discharge vanes. having chamfered side edges received in said grooves, and transverse rivets connecting said side plates and each secured to a vane.

In 'a centrifugal compressor, a difi'user my hand this twenty ninth day of July, having its side plates grooved, discharge 1912. vanes having their side edges recelved in said grooves, and a transverse rivet connecting v LOUIS LOEWENSTEIN' said side plates near the outer end of each \vitnesses: vane and secured to said vane. JOHN A. McMANUs, Jr.,

In witness whereof, I have hereunto set FRANK G. HA'I'IIE.

Copies of thin patent may be obtained for five cents each, by addreulng the Commissioner of Patents.

Wuhlngton, D. G. 

